Every year, millions of people around the world make New Year’s resolutions. And every year, the great majority of us break and abandon those resolutions. Psychology research can help.

Children and families wait in line, as holiday gifts and toys are distributed to underprivileged children at the Fred Jordan Mission in Los Angeles December 21 2013.
Phil McCarten/ReutersSeptember 22, 2015

Few people would argue with the idea that sleep is good for us, but not many of us know that a lack of sleep can cause weight gain. The health benefits of sleep are extremely well-documented. It provides…